I was thinking something like the FSF or the Software Freedom Conservancy, which is a charity in the US, and amongst other things lets member projects accept donations as a charity.
I say this because I have donated to projects, but not the SFC in the past, despite their admirable mission.
https://sfconservancy.org/projects/current/
https://sfconservancy.org/sustainer/
It would aim to be more about building and doing, than a talking shop that writes Strategies, Reports, and other waffle that would be ignored anyway.
Beyond the building and doing I feel there is a need for some guidance so providers can understand how they can use open source while meeting their obligations to patients and staff, but also procurement (Maybe this exists already).
What are the costs? / What are the benefits? / how can they use a project with their existing staff?
Even large trust rarely have in-house programmers - and those that do have 100% of their time already allocated. Most have system administrators and maybe a professional DB engineer if they are lucky.
(@mods should this be a new ‘topic?)